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| Optimum Design of Plane Control Net for Construction of Ballastless Track of Passenger Dedicated Railway |
| LU Jian-kang1，REN Zi-zhen2 , CEN Min-yi 2 |
| 1. China Railway Eryuan Engineering Croup Co. Ltd, Chengdu, Sichuan 610031，China; 2. Southwest Jiaotong University，Chengdu, Sichuan 610031，China |
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Abstract Research purposes: The method of distributing plane control net and principles of precision design are presented in this paper through doing the researches on the design of plane control net for construction of ballastless track of passenger dedicated railway.
Research methods: By doing the simulation tests and making theoretical analysis of error, the inverse calculation was done for the precisions of control nets at all levels and the researches were done on the method of distributing control oat and the principle of precision design.
Research results: The method of distributing plane control net and principles of precision design are presented.
Research conclusions：The limitation value of long deformation of coordinate projection of the control net for construction of ballastless of passenger dedicated railway should not be over 10 mm/km. A pair of inter-visible GPS spots far away of approximate l km should be laid out within the range of S km along the railway fur the control net. The extending aux- diary facilities with approximate values and conducting wires should be installed between the GPS spots and the side length of the suite should be between 400-60D mm. The angle error caused by the error of any three adjacent control foundation pile spots should not he over 8 minutes.
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Received: 19 March 2007
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[1]卢建康.铁路客运专线测量方法探讨[J].铁道勘察， 2005,31(6):1-4.
[2]铁道部高速铁路办公室，京沪高速铁路测量暂行规定 [S].北京:中国铁道出版社，2003.
[3]武汉测绘科技大学测量平差教研室.测量平差基础 [M].北京:测绘出版社,1994.
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2007, Vol. 24 
